G4CosmicFilter: Fix placement of thread-safety checker flag file.

Should be in the include directory.

This merge request affects 1 package:

• Simulation/G4Extensions/G4CosmicFilter

This merge request affects 2 files:

• Simulation/G4Extensions/G4CosmicFilter/ATLAS_CHECK_THREAD_SAFETY
• Simulation/G4Extensions/G4CosmicFilter/G4CosmicFilter/ATLAS_CHECK_THREAD_SAFETY

Adding @jchapman as watcher

added Simulation master review-pending-level-1 labels

CI Result SUCCESS (hash 5fa43f39)

	Athena	AthSimulation
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 62731]

removed review-pending-level-1 label

added review-approved label

merged

mentioned in commit 6729fc1a

added sweep:ignore label